gstreamer flvmux和rtmp错误 [英] gstreamer flvmux and rtmp error

问题描述

我试图从rasberrypi流rtmp，顺便说一下，omx硬件编码器工作得非常好，所以我正在运行:

I trying to stream rtmp from rasberrypi, the omx hardware encoder worked really nice, by the way, so I'm running:

gst-launch-1.0 v4l2src ! «video/x-raw,width=640,height=480,framerate=30/1» !\
 omxh264enc target-bitrate=1000000 control-rate=variable !\
 video/x-h264,profile=high ! h264parse ! queue ! \
flvmux name=mux alsasrc device=plughw:1 ! audioresample ! \
audio/x-raw,rate=48000,channels=1 ! queue ! voaacenc bitrate=32000 ! queue ! mux. mux. !\
 rtmpsink location='rtmp://my_rtmp_for_ustream.tv_url'

有一个错误:

Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstAudioSrcClock
ERROR: from element /GstPipeline:pipeline0/GstAlsaSrc:alsasrc0: Internal data flow error.
Additional debug info:
gstbasesrc.c(2812): gst_base_src_loop (): /GstPipeline:pipeline0/GstAlsaSrc:alsasrc0:
streaming task paused, reason not-negotiated (-4)
Execution ended after 535913298 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
libv4l2: warning v4l2 mmap buffers still mapped on close()
Freeing pipeline ...

首先，我认为存在一些alsa问题或类似问题，但后来我尝试编写简单的mpegts并奏效了:

First of all i thought that there is some alsa problems or such, but then I tried to write simple mpegts and it worked:

gst-launch-1.0 v4l2src ! «video/x-raw,width=640,height=480,framerate=30/1» ! \
omxh264enc target-bitrate=1000000 control-rate=variable !\
 video/x-h264,profile=high ! h264parse ! queue ! \
 mpegtsmux name=mux alsasrc device=plughw:1 ! audioresample !\
 audio/x-raw,rate=48000,channels=1 ! queue ! voaacenc bitrate=32000 ! \
queue ! mux. mux. ! filesink location=1.ts

但是我不能仅将"filesink location = 1.ts"更改为rtmpsink location ='rtmp://my_rtmp_for_ustream.tv_url'，因为我会收到错误消息:

But i can't just change "filesink location=1.ts" to rtmpsink location='rtmp://my_rtmp_for_ustream.tv_url' because i'll get an error:

警告:错误的管道:无法将多路复用器链接到rtmpsink0

WARNING: erroneous pipeline: could not link mux to rtmpsink0

那么，我该怎么做才能使其正常工作?谢谢.

So, what can I do to get it work? Thanks.

推荐答案

真正的问题是rtmpsync需要原始的aac，所以我添加了aacparse并成功了，就像这样:

Real problem was that rtmpsync need raw aac, so I added aacparse and it worked out, something like this:

gst-launch-1.0 v4l2src ! \
   "video/x-raw, framerate=25/1, width=320, height=240" ! \
   omxh264enc target-bitrate=300000 control-rate=variable ! \
   h264parse ! queue ! flvmux name=muxer alsasrc device=hw:1 ! \
   audioresample ! "audio/x-raw,rate=48000" ! queue ! \
   voaacenc bitrate=32000 ! aacparse ! queue ! muxer. muxer. ! \
   rtmpsink location="$RTMP_URL"

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